King Step-Up Model 2370W Fiberglass Sousaphone  

King - Key of BBb

3 valves

.687" bore

 26" bell

Brass valve section with clear lacquer finish

 White pebble fiberglass bell and body

 Modular construction

 Heavy duty bracing

 Nickel plated pistons

 King 2 mouthpiece

 7760C molded plastic shell case with wheels